John chivill



(NoModel.) l J. GHIVIL-L.

SCREW CONVEYBR UPLING'.

'I Patented Dec. 4, 1883@ N. Pneus. Plmm-Lnhugmvher, wnsningmn. n c.

y A"UNITED STATES FFIC'E.

PATENT JOHN CHIVILL, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WEBSTER 8U COM-` STOCK MANUFACTURING COMPANY, OF SAME PLACE.

SCREWFCONVEYER COUPLING.

SPECIFICATION forming part of Letters Patent No. 289,751, dated December 4, 1883.

Application led October 20, 1883. (No model) To @ZZ whom t may concern.-

Be it known that I, JOHN CHIvILL, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Screw-Conveyer Couplings, of which the following, in connection with the accompanying drawings, is a specification.

In the drawings, Figure 1 is a side view of a screw-conveyer coupling embodying my improvements. Fig. 2 is a central longitudinal vertical section thereof, and Fig. 3 is a detail end View of the same.

Like letters of reference indicate like parts.

My invention relates to an improved construction of the collar or coupling and end lug by which the respective sections of the conveyershaft are united together, and thefscrew or flight to the end lug, as shown in Letters Patent of the United States No. 272,006, is-

sued to Vebster and Chivill, February 6, 1883; and it consists in constructing the collar and end lug of one and the same piece of cast or wrought metal, and so that the end lug shall iit the surface of the screw or iiight, substantially as hereinafter more particularly described and claimed.

In the screw-conveyer coupling of Webster and Chivill, above referred to, the iiights are attached to the collar or coupling by means of an independent end lug, which is screwthreaded and enters a hole drilled through the collar and correspondingly screw-threaded, and the other end riveted to the flight or screw.

In practice I have found this lug to be the .weakest point in the conveyer, by reason of the twisting strain produced by the rotary movement of the conveyer. By constructing the collar and end lug in one piece of cast or wrought metal, as herein shown and described, I obviate the labor and expense of cutting the 4o screw-thread on one end ofthe end lug .and drilling and screw-threading the hole in the` collar to receive the lug, and add strength to the conveyer at the point most needed.

In the drawings, A A represent the tubular 4 5 sections; B B, screw-nights; D D, collars or ferrules; D D', inwardly-projecting ribs or feathers on said collars 5 E, coupling plug or core; F F, bolts passing through collars or ferrules D D, feathers D D', and through the 5o plug E; and G, the hangers for supporting the conveyer, all of which are old and fully shown and described in the aforesaid patent of Webster and Chivill. To the collars or ferrules D D are attached, as a part thereof, the end lugs, d 55 d, which are so formed as to fit the surface of the screw or flight, and to which the Ascrew or flight is attached by riveting, in the usual manner.

Having thus described my invention, What 6o I claim as new, and desire to secure by Letters Patent, is

1. The collars D D and end lugs, d d, made in one piece of cast or wrought metal, substantially as and for the purpose specified. 6 5

2. The collars D D, provided with end lugs, d d, formed to t the surface of the screw or flight, substantially asshown and described.

JOHN CHIVILL. Vitnesses:

HENRY FRANKFURTER, W. S. BAKER. 

